CONSOLIDATED STATEMENTS OF OPERATIONS - (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 36,605	$ 37,973
Cost of sales	7,008	7,427
Gross profit	29,597	30,546
Operating expenses:
Commissions and incentives	14,889	15,199
Selling and administrative expenses	6,855	7,576
Depreciation and amortization expense	520	528
Other operating costs	5,322	6,123
Total operating expenses	27,586	29,426
Income from operations	2,011	1,120
Interest income (expense), net	50	(95)
Other (expense) income, net	(208)	4
Income before income taxes	1,853	1,029
Income tax (provision) benefit	934	(341)
Net income	$ 2,787	$ 688
Earnings per common share:
Basic (in dollars per share)	$ 1.17	$ 0.29
Diluted (in dollars per share)	$ 1.15	$ 0.28
Weighted-average common shares outstanding:
Basic (in shares)	2,391	2,396
Diluted (in shares)	2,415	2,462